Here's a tip: if you're tempted to put numbers in parenthesis after putting them in words, resist. Use **the Chicago Manual** of Style approach instead. Numbers one through ten should be written as words. From eleven on, use **Arabic numbers**.

For example, you could write (1-10) as "1 to 10," or simply "1-10." But if you really want to include parentheses around the number, then do it: "(1-10)." Or you can write up to a thousand in **English or French numbers** too: "11-20.'"

And for numbers beyond that? Well, you get the idea. The only real requirement is that you should always use digits from 11 onward, otherwise you'll run into problems later when formatting your document using styles.

Parentheses are used to indicate a choice, a possibility, or an exception. They are used commonly in mathematics and science. For example, when solving an equation, you might need to use one of the variables as a solution within the parentheses.

In mathematics and science, parentheses are used to **group elements** together. For example, people often say that multiplication "groups" its inputs together, division "groups" its inputs apart, and addition and subtraction "group" their inputs together to create **a single output**.

- How do you put numbers in parentheses?
- How do you write numbers on paper?
- Why do lawyers write numbers in parentheses?
- How do you write numbers in words?
- How do you write numbers in official documents?
- Why do people spell out numbers in parentheses?
- How do you write numbers in English or spell them?
- Do you spell out numbers in titles?

Numbers can be written as words (for example, one hundred) or as numerals (e.g., 100). In **this paper**, we adhere to the requirements of **APA Style**, which is one of **the most often used style guides** in academic writing. In general, numbers 0 through 9 should be written in words, whereas numbers 10 and up should be written in numerals. Also, dates should always be written in words.

You can write numbers on paper in several ways. You can use words to describe **how many times** that number appears (for example, "fifty five times"), you can use symbols for **each time** (55), or you can just write the number itself (155). Numbers less than 10 are usually written in words; numbers greater than 10 are usually written in numerals.

Here are some examples of how numbers can be written on paper: 55 occurrences of the number five; 95 teenagers; 3,500 miles.

It's very common in mathematics and science for numbers to be written out in full. For example, when working with equations, mathematicians often write out both sides of an equation separately. When scientists want to show how much something costs, they usually write out the total amount being spent even if it's not for one object. Doing this shows other researchers what kind of budget they have to work with. It also makes it easier to calculate the cost later if needed.

In business, numbers are sometimes written out in order to save space.

The closest I could think of was that numerical numbers in a formal document or contract are frequently critical to its purpose. Restating a number in parentheses after spelling it out ensures that the number is correct.

A fundamental guideline for writing numbers is that little numbers from one to ten (or one to nine, depending on the style guide) should be spelt explicitly. Larger numbers (those more than 10) are written as numerals.

Words are used instead of numbers for **large groups** of people or things. For example, "all men" and "most students" are correct usage. However, when talking about a single man or woman, they must be replaced with "a man" or "a woman".

Numbers less than ten can also be spelled out if this simplifies understanding. So "three people" and "seven years old" are valid statements. But "three-four" and "seven-eight" are not. The first part of **the sentence functions** as a noun, so it needs **a singular verb form**.

For numbers over ten, spelling out the digits is required. So "twelve people" and "two hundred and fifty dollars" are correct uses of the language. But "twelve-four" and "two fifty-seven" are not. Again, the first part of **the statement functions** as a noun, so it needs **a singular verb form**.

When writing about numbers, it is important to use the right word for the job. A number may be big or small, long or short.

The Proof Is in the Numbers.

- Spell out numbers below 10 and big round numbers.
- If you chose to spell out multi-word whole numbers between 22 and 99, use hyphens.
- Also use hyphens when those numbers are part of bigger numbers.
- When writing large numerals, use commas.

It also focuses the eye to the numbers, allowing for a speedy scan of a document, such as a purchase order.

For **longer numbers**, use digits (the numbers 0 to 9). So, for "8," write "eight," but for "213," just write the numbers out. If you have to use **two words** to write a number, you should probably simply write the digits. For example, "sixteen" is correct but "sixteen years old" isn't. "Sixteen" can be used as a noun or a verb.

For math problems, numbers are usually written in mathematics notation. This means that you should pick a number line and follow its directions. Don't worry about putting symbols on top of each other or mixing up **decimal points**; the mathematician knows what they're doing and has probably taken care of these issues for you.

English uses the same symbols for numbers as it does for letters of the alphabet. These symbols are called numerals. There are three types of numerals: single-digit numbers, multi-digit numbers, and decimal numbers.

Single-digit numbers are easy to write because there's only one way to do it. The numeral 1 appears once in a sentence, so write a space then the word for **one letter** short. So, the sentence "I'm only one letter short" would be written "I'm only 1 short." One through nine appear often enough in sentences that people will know what you mean.

Making Small and Big Numbers **A fundamental guideline** for writing numbers is that little numbers from one to ten (or one to nine, depending on **the style guide**) should be spelt explicitly. Thus 12:00 is written "12 o'clock", not "12 digit". Other ways of expressing time are by using periods (for example, 3:50 is written "3:50 pm") or AM/PM (for example, 9:00 am is written "9 am").

It is acceptable to write large numbers as numerals; for example, 547-04-44-10 would be written as "547-04-44-10". However, this is not common practice.

Large numbers can also be expressed in words and phrases such as million, billion, trillion, etc. For example, a million people would be written as 1 million person, while a billion dollars would be written as $1 billion.

It is important to distinguish between **small and large numbers**. While it is correct to write out **small numbers** from one to ten, larger numbers should be expressed as numerals.